The length of index finger relative to fourth finger has been measured on parents and children in 190 families belonging to an endogamous Reddy community of Nalgonda District, India. The distribution of relative index finger length among various family groups was unimodal and symmetric. Heritability estimates based on parent-offspring regressions indicate a moderate level (40--70 percent) of additive genetic variance. There was no evidence for the influence of sex-linked additive genes.

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A total of 220 persons belonging to the Kolam tribe in the Adilabad District of northwest Andhra Pradesh have been tested for 18 red cell enzyme systems and for haemoglobin. Generally, the gene frequencies for the systems which showed electrophoretic variation were within the range for Indian populations; the gene frequency for AK¹ is high by Indian standards and Hb AS is present. LDH Calcutta 1 was not detected in this population and a single example of PHI 2-1 was observed.

A total of almost 200 members of a tribal group, the Chenchu from the Maha-bubnagar and Kurnool districts of Andhra Pradesh, have been tested for electrophoretic variation in a number of red cell enzyme systems. The former population has also been tested for ABO, MN and Rh blood group systems and for the serum proteins Hp, Tf and albumin. The most significant findings were the presence of the gene r^y, and the occurrence of a polymorphism in PHI with the variant gene PHI⁵ having a gene frequency of 4%.